This document proposes an enhanced smoke detection system with emergency lights and remote messaging capabilities. It would use a heat sensor to detect fires and send SMS alerts to emergency contacts and stations. It also includes an emergency light system powered by a rechargeable battery to operate during power outages. The total estimated cost is 2,790 Taka but could be reduced to 2,000 Taka for mass production. Some limitations include the heat sensor being sensitive to other temperature changes and noise interference.

1. {
Enhanced Smoke Detection System
with
EMERGENCY LIGHTS
and
REMOTE MESSAGING SYSTEM

2. Submitted By:
0906172
0906175
0906182
0906184
0906187

3. Objective

4. Reasons of Major Losses
• Lower quality of Fire Detection System
• Communication gap among the buildings and Nearest Fire Service Stations
• Lack of Fire Extinguishers
• Absence of Emergency Systems

5. Project Overview:
• A remote SMS system to communicate immediately with nearest fire
stations, local PS, local hospitals and other necessary places
• A emergency light system in case of power failure

6. Required chips
• ATMEGA32A
• LM35 (Heat Sensor)
• LM324 (Op-Amp)
• 7404 (Not Gate)
• SIM900 (GSM Module)

7. Block Diagram (Emergency Light)
Main
Line
220-6V
XFR
Charge/
Discharge
DC Battery
Emergency Light

8. Block Diagram (Remote SMS)
5V Vcc
LM35 (Heat Sensor)
Voltage Comparator
ATMEGA32A
GSM Module

9. Circuit Diagram

10. Remote SMS System
• The GSM module (SIM 900) is interfaced with ATMEGA32A in the total
system

11. Sensing The Fire
• A heat sensor (LM35) is used to detect room temperature
• A comparator circuit is used to compare the output voltage of LM35 with a
given reference voltage
• If the output is above certain level, it takes the decision that a fire incident
has occurred

12. SOS
As the fire has been detected, the module will automatically send SMS to
necessary persons and places

13. Emergency Light System
50
40
30
20
0 Column2
Series 1
10
Series 1
Column1
Column2

14. Emergency Light System
• Powered by a rechargeable DC battery
• If the main power goes off, the emergency lights automatically turn
on
• Other times, the battery is being charged and kept nearly 100%
charged

15. Cost Estimation
• GSM Module- Tk. 2300
• Transformer (220-6V)- Tk. 65
• Microchip (ATMEGA32A)- Tk. 200
• Heat Sensor (LM35)- Tk. 45
• DC Battery (2 pcs)- Tk.50
• Miscellaneous- Tk. 130
• Total Cost- Tk. 2790
In case of MASS PRODUCTION, total cost can be decreased to Tk. 2000
(estimated)

16. Limitations
• LM35 is very sensitive, so in case of other temperature arising incidents, the
system can turn on.
• The output of LM35 is in mV range (10 mV/◦C), so minor noise can activate the
system

17. Future Development
• Inclusion of fire alarm
• Automated Fire Extinguishers in sensitive places

18. Cautions
• Both GSM Module and Microchips are voltage sensitive, minimum
increase can harm these devices
• GSM module is temperature sensitive
• Total system (except the LM35) should be installed in a neutral place

19. Thank you
Save life, save property, get your own device now
Contact
Antar, Didar, Pradip, Siam, Shantonu
4008, Sher-e Bangla Hall, BUET